Electrons are the thing in the outer energy levels
Answer:
the sing post
Explanation:
because the reference frame is a fixed object that determines whether a body is in motion or not so the other passengers are fixed but relative to the the the man is at rest but relative to the sign post it is in the motion, did I get me, sister
Answer:
it is an exothermic reaction
Answer:
B. Mechanical waves must travel through a medium, but electromagnetic waves do not require a medium.
Explanation:
A wave is defined as any disturbance that transmits energy from one point to another.
Waves can be typically classified as either mechanical or electromagnetic waves.
Mechanical waves are waves that requires a medium for their propagation. In a vacuum, they cannot be propagated and would not cause any disturbance. An example is sound waves.
Electromagnetic waves do not require a medium to be propagated. They can pass through any substance in nature. Electromagnetic radiations belongs to this class.